I'm sure most countries would like to think they are taking an evidence-based approach. A lot of the evidence is not very clear though, there are many unknowns.

I'm sure most countries would like to think they are taking an evidence-based approach. A lot of the evidence is not very clear though, there are many unknowns. If you think you understand all the mechanisms, just listen to one of the prominent virologists. It's not any different to other areas: the more you learn, the more you realize how much you don't know. If anyone claims otherwise, they probably don't deserve your trust. In such an environment, it's impossible for politicians to take decisions that are good in all aspects, but at least regarding health, assuming that's a priority, they can either err on the cautious or on the risky side. Compared to most other countries, Sweden is clearly taking the latter approach.